<nav class="navbar navbar-expand-lg navbar-light bg-light navbar-static-top">
    <div class="container">
      <!-- Branding Image -->
      <a class="navbar-brand " href="{{ url('/') }}">
        Laravel Shop
      </a>
      <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
        <span class="navbar-toggler-icon"></span>
      </button>

      <div class="collapse navbar-collapse" id="navbarSupportedContent">
        <!-- Left Side Of Navbar -->
        <ul class="navbar-nav mr-auto">
            <!-- 顶部类目菜单开始 -->
            <!-- 判断模板是否有 $categoryTree 变量 -->
            @if(isset($categoryTree))
            <li class="nav-item dropdown">
                <a href="#" class="nav-link dropdown-toggle" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false" id="categoryTree">所有类目 <b class="caret"></b></a>
                <ul class="dropdown-menu" aria-labelledby="categoryTree">
                <!-- 遍历 $categoryTree 集合，将集合中的每一项以 $category 变量注入 layouts._category_item 模板中并渲染 -->
                @each('layouts._category_item', $categoryTree, 'category')
                </ul>
            </li>
            @endif
            <!-- 顶部类目菜单结束 -->
        </ul>

        <!-- Right Side Of Navbar -->
        <ul class="navbar-nav navbar-right">
          <!-- Authentication Links -->
          @guest
            <li class="nav-item"><a class="nav-link" href="{{ route('login') }}">登录</a></li>
            <li class="nav-item"><a class="nav-link" href="{{ route('register') }}">注册</a></li>
          @else
            <li class="nav-item">
                <a class="nav-link mt-1" href="{{ route('cart.index') }}"><i class="fa fa-shopping-cart"></i></a>
            </li>
            <li class="nav-item dropdown">
                <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                <img src="https://cdn.learnku.com/uploads/images/201709/20/1/PtDKbASVcz.png?imageView2/1/w/60/h/60" class="img-responsive img-circle" width="30px" height="30px">
                {{ Auth::user()->name }}
                </a>
                <div class="dropdown-menu" aria-labelledby="navbarDropdown">
                <a href="{{ route('user_addresses.index') }}" class="dropdown-item">收货地址</a>
                <a href="{{ route('products.favorites') }}" class="dropdown-item">我的收藏</a>
                <a href="{{ route('orders.index') }}" class="dropdown-item">我的订单</a>
                <a href="{{ route('installments.index') }}" class="dropdown-item">分期付款</a>
                <a class="dropdown-item" id="logout" href="#"
                    onclick="event.preventDefault();document.getElementById('logout-form').submit();">退出登录</a>
                <form id="logout-form" action="{{ route('logout') }}" method="POST" style="display: none;">
                    {{ csrf_field() }}
                </form>
                </div>

            </li>
          @endguest
        </ul>
      </div>
    </div>
</nav>
